Underwater photographer of the year 2017 winners – in pictures

British Underwater Photographer of the Year 2017 - Out of the Blue Kukulkan Cenote on Mexico’s Yucatan Peninsula forms part of the Chac Mool system and is noted for the spectacular light effects as the sun penetrates the darkness-The Atlantic

Best photos of the day: colourful homes and a tired monk

Pachuca , Mexico Houses on a hill are painted with vivid colours in Hidalgo state as part of a government initiative that seeks to motivate young people living in high crime areas to participate and decorate their environment Photograph: Yuri Cortez